20 entries under concavity topic. ×

18
furrow(noun, depression, ditch, channel, scrape)
15
hollow(noun, area, depression, empty, ditch)
15
dip(noun, decline, low, depression, channel)
9
depression(noun, decline, low, ditch, scrape)
8
pit(noun, depression, drain, hollow, ditch)
7
cavity(noun, depression, hollow, scrape, mine)
6
excavation(noun, drain, dip, ditch, bottom)
4
concavity
4
dent(noun, depression, hollow, scrape, indentation)
3
alveolus
3
dimple(depression, dip, hollow, bottom, scrape)
3
dint(depression, hollow, scrape, indentation, chip)
3
follicle
3
indentation(noun, depression, dip, hollow, bottom)
3
lacuna
3
sinus
1
hollowness
1
honeycomb
1
intaglio
0
strip mine(expression, idiom)
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APASmart Define. (2015). trough thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/trough/thesaurus/synonyms
ChicagoSmart Define. 2015. "trough thesaurus" https://smartdefine.org/trough/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, trough thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/trough/thesaurus/synonyms>.
MLASmart Define. "trough thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/trough/thesaurus/synonyms>